Segment and Geographic Information (Tables)

12 Months Ended

Sep. 30, 2012

Segment and Geographic Information [Abstract]

Summarize the companies segment information

	YEAR ENDED SEPTEMBER 30,
	2012			2011			2010
Net sales:
Seismic	$	178,221		$	158,653		$	114,774
Thermal Solutions		12,642			13,519			12,955
Corporate		801			798			804
Total		191,664			172,970			128,533
Income (loss) from operations:
Seismic		59,455			53,477			28,955
Thermal Solutions		1,014			(37	)		397
Corporate		(9,604	)		(9,035	)		(8,244	)
Total		50,865			44,405			21,108
Depreciation, amortization and stock-based compensation:
Seismic		8,533			5,990			3,995
Thermal Solutions		320			345			375
Corporate		1,496			1,448			1,259
Total		10,349			7,783			5,629
Interest income:
Seismic		581			139			165
Thermal Solutions		5			—			—
Corporate		157			128			89
Total		743			267			254
Interest expense:
Seismic		199			—			—
Thermal Solutions		—			—			—
Corporate		—			43			238
Total		199			43			238

Details of sales

	YEAR ENDED SEPTEMBER 30,
	2012			2011			2010
United States	$	216,741		$	155,781		$	127,972
Canada		23,741			8,966			3,706
Russian Federation		9,837			10,144			7,973
United Kingdom		4,064			4,883			3,432
Eliminations		(62,719	)		(6,804	)		(14,550	)
	$	191,664		$	172,970		$	128,533

Summaries of net sales by geographic area

	YEAR ENDED SEPTEMBER 30,
	2012		2011		2010
Asia (excluding Middle East)	$	10,753	$	22,772	$	11,684
Canada		59,602		13,158		6,011
Europe		3,043		34,278		13,375
Middle East		8,542		6,588		9,441
United States		102,378		92,368		85,423
Other		7,346		3,806		2,599
	$	191,664	$	172,970	$	128,533

Long-lived assets

	AS OF SEPTEMBER 30,
	2012		2011
United States	$	35,577	$	43,992
Canada		29,696		5,135
Russian Federation		5,760		4,108
United Kingdom		442		471
China		11		8
	$	71,486	$	53,714